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Erasers are made from either natural or synthetic rubber. Natural rubber is produced from latex that is collected from rubber trees. Water is removed from the latex, increasing the rubber content to 60%. Acid is added to the liquid concentrate in order to produce solid sheets of dry rubber.
Erasers. In 1770, the first version of the rubber eraser was sold by an English optician and engineer named Edward Nairne. Edward got his invention by accident âhe meant to pick up bread crumbs to erase some pencil markings, as was common at the time, but his hands landed on a nearby piece of rubber.